Water flows over a section of Niagara Falls at a rate of 1.30 × 10^6 kg/s and falls 52.0 m. What is the power dissipated by the waterfall?

a. 6.6E+8 W
b. 6.8E+7 W
c. 4.0E+7 W
d. 5.3E+8 W
e. 8.6E+6 W


a

Physics & Space Science

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A rock attached to a string swings in a vertical circle. Which free-body diagram could correctly describe the force(s) on the rock when it is at the lowest point, where  is the normal force,  is weight, and

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B.

C.

D.

E.

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What will be an ideal response?

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